Texas Instruments CC3235x SimpleLink™ Wi-Fi® MCU Solution

Texas Instruments CC3235x SimpleLink™ Wi-Fi®, Dual-Band Single-chip Wireless MCU Solution integrates two processors within a single chip and comes in two variants, the CC3235S and CC3235SF. The CC3235S incorporates 256KB of RAM, IoT networking security, and device identity/keys. The CC3235S additionally offers MCU-level security features such as file system encryption, user IP (MCU image) encryption, secure boot, and debug security. The CC3235SF builds on the CC3235S and integrates a user-dedicated 1MB of executable flash in addition to the 256KB of RAM.

The Texas Instruments CC3235x SimpleLink Series provides a network processor to run all Wi-Fi and internet logical layers. The ROM-based subsystem completely offloads the host MCU, including an 802.11a/b/g/n dual-band 2.4GHz and 5GHz radio, baseband, and MAC with a powerful hardware cryptography engine. The CC3235x devices feature capabilities that simplify the connectivity of IoT applications. These features include 802.11a (5GHz) support, BLE/2.4GHz radio coexistence, antenna selection, enhanced security with FIPS 140-2 Level 1 certification, up to 16 concurrent secure sockets, and a certificate sign request (CSR).

Features

Multiple-core architecture, system-on-chip (SoC)
802.11 a/b/g/n: 2.4GHz and 5GHz
FIPS 140-2 Level 1 Certification
Multilayered security features help developers protect identities, data, and software IP
Low-power modes for battery powered application
Coexistence with 2.4GHz radios
–40°C to +85°C industrial temperature
Wi-Fi CERTIFIED™ by the Wi-Fi Alliance^®
Application microcontroller subsystem
- Arm^® Cortex^®-M4 core at 80MHz
- User-dedicated memory
  - 256KB RAM
  - Optional 1MB executable Flash
- Rich set of peripherals and timers
- 27 I/O pins with flexible multiplexing options
  - UART, I²S, I²C, SPI, SD, ADC, 8-bit parallel interface
  - Timers and PWM
Wi-Fi network processor subsystem
- Wi-Fi core
  - 802.11 a/b/g/n 2.4GHz and 5GHz
  - Modes:
  - Access Point (AP)
  - Station (STA)
  - Wi-Fi Direct^® (only supported on 2.4GHz)
  - Security:
  - WEP
  - WPA™/WPA2™ PSK
  - WPA2 Enterprise
- Internet and application protocols
  - HTTPs server, mDNS, DNS-SD, DHCP
  - IPv4 and IPv6 TCP/IP stack
  - 16 BSD sockets (fully secured TLS v1.2 and SSL 3.0)
- Built-in power management subsystem
  - Configurable low-power profiles (always, intermittent, tag)
  - Advanced low-power modes
  - Integrated DC/DC regulators
Multilayered security features
- Separate execution environments
- Networking security
- Device identity and key
- Hardware accelerator cryptographic engines (AES, DES, SHA/MD5, CRC)
- Application-level security (encryption, authentication, access control)
- Initial secure programming
- Software tamper detection
- Secure boot
- Certificate signing request (CSR)
- Unique per device key pair

Application throughput
- UDP: 16 Mbps, TCP: 13Mbps
- Peak: 72Mbps
Power-Management Subsystem
- Integrated DC/DC converters support a wide range of supply voltage:
  - VBAT wide-voltage mode: 2.1V to 3.6V
  - VIO is always tied with VBAT
- Advanced low-power modes
  - Shutdown: 1µA, hibernate: 4.5µA
  - Low-power deep sleep (LPDS): 120µA
  - Idle connected (MCU in LPDS): 710µA
  - RX traffic (MCU active): 59mA
  - TX traffic (MCU active): 223mA
Wi-Fi TX power
- 2.4GHz: 18.0dBm at 1 DSSS
- 5GHz: 18.1dBm at 6 OFDM
Wi-Fi RX sensitivity
- 2.4GHz: –96dBm at 1 DSSS
- 5GHz: –92dBm at 6 OFDM
Clock source
- 40.0MHz crystal with internal oscillator
- 32.768kHz crystal or external RTC
RGK package
- 64-Pin, 9mm × 9mm very thin quad flat nonleaded (VQFN) package, 0.5mm pitch
The device supports SimpleLink™ MCU Platform Developer’s Ecosystem

Applications

Internet of Things (IoT)
- Building and home automation
  - HVAC systems and thermostats
  - Video surveillance, video doorbells, and low-power camera
  - Building security systems and E-locks
- Appliances
- Asset tracking
- Factory automation
- Medical and healthcare
- Grid infrastructure